Microsoft's Cortana digital assistant keeps getting new and fun updates on the server side. Today, users who have Cortana installed on Windows Phone 8.1 and Windows 10 can get a riddle to solve when they say, "Surprise me."

As you can see in the image above, Cortana has the riddle shown as if it was displayed in a mirror. We will leave it to you to solve this puzzle, and if you do Cortana asks that you retweet it. This new server-side feature is in addition to one Microsoft added to Cortana a few days ago, where it will offer up a random piece of trivia if you say "What's up".

Hopefully we will see more of these fun distractions from Microsoft added to Cortana in the weeks and months ahead.